Is there a tool that validates content created with Flash CS5 Professional automatically?
No. Content created with Flash is inherently more complex than HTML. Consequently, it is difficult to construct measurable rules and even more difficult to validate those rules. Content may be easily created with Flash to comply with Section 508 guidelines; however, these guidelines do not directly translate into guidelines for such content. For example, Section 508 and the World Wide Web Consortium (W3C) require that a text alternative be provided for all images in HTML. In cases where the image contains no content, a special alt tag is used to hide the image from a screen reader. In Flash CS5 Professional, text equivalents are not needed for all elements of a movie. Using the autolabeling feature, text equivalents are automatically provided for several elements. Moreover, designers and developers can use the Make Child Object Accessible feature to hide elements that convey no content or are difficult to render using assistive technologies.